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Fitting an electric shower in a house with an old fuseboard

  • 15-12-2013 9:01pm
    #1
    number_1
    Registered Users, Registered Users 2 Posts: 141 ✭✭


    I'm in a house with an old fuseboard (no MCBS, just fuses for each circuit). I want to fit an electric shower in the bathroom (no previous electric shower installed). Would an electrician be happy to install a single RCD for the shower on the old fuseboard, or is it likely that they'll insist on replacing the entire board with an MCB board? I haven't got the cash for the larger job, so the likelihood of an electrician being happy to just fit a new RCD on the old board will decide if the job can go ahead.

    Also, is it recommended to use 6sq or 10sq cable for an 8.5kW shower? I'm assuming that it just requires twin+earth cable.


Comments

  • #2
    tomdempsey200
    Registered Users, Registered Users 2 Posts: 1,890 ✭✭✭tomdempsey200


    you'd have to get them out to take a look and decide


  • #3
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,641 Mod ✭✭✭✭2011


    +1 to tomdempsey200
    number_1 wrote: »
    Also, is it recommended to use 6sq or 10sq cable for an 8.5kW shower? I'm assuming that it just requires twin+earth cable.

    Depends on the earth fault loop impedance, which generally means that if it is a short length of run a 6sq. will be sufficient.


  • #4
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    A small separate board just for the shower can be added, if the tails to the existing fuse board are big enough. Its likely if its an old fuse board though, that the tails will be too small.


  • #5
    bertie1
    Banned (with Prison Access) Posts: 509 ✭✭✭bertie1


    Not to mention the bonding and the earth rod


  • #6
    Sir Arthur Daley
    Closed Accounts Posts: 6,720 ✭✭✭Sir Arthur Daley


    2011 wrote: »
    +1 to tomdempsey200



    Depends on the earth fault loop impedance, which generally means that if it is a short length of run a 6sq. will be sufficient.
    I did the electrical and plumbing on 3 bathrooms within the last 2 months, i ran 10sq to 2 of the installations, 6sq did not generally suffice in these two cases.


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